Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Can a user force multiprocessing OFF in Firefox Quantum?

more options

Can a user force multiprocessing OFF in Firefox Quantum?

I'd like to see if this helps with the slowness experienced on some pages when Quantum is used together with the NVDA screen reader. (See https://www.nvaccess.org/post/in-process-halloween-2017-edition/ regarding that problem).

Quantum+NVDA is so slow with some pages that I had to kill some other processes first, in order to be able to kill the Firefox process tree.

Thanks.

P.S. - I tried to "Automatically add" my "Troubleshooting Information" but that gave me a "We're sorry, but we can't find what you're looking for." error. URL: https://addons.mozilla.org/firefox/downloads/latest/troubleshooter/addon-426841-latest.xpi. See attached screenshot.) Perhaps that's not compatible with Quantum.

Can a user force multiprocessing OFF in Firefox Quantum? I'd like to see if this helps with the slowness experienced on some pages when Quantum is used together with the NVDA screen reader. (See https://www.nvaccess.org/post/in-process-halloween-2017-edition/ regarding that problem). Quantum+NVDA is so slow with some pages that I had to kill some other processes first, in order to be able to kill the Firefox process tree. Thanks. P.S. - I tried to "Automatically add" my "Troubleshooting Information" but that gave me a "We're sorry, but we can't find what you're looking for." error. URL: https://addons.mozilla.org/firefox/downloads/latest/troubleshooter/addon-426841-latest.xpi. See attached screenshot.) Perhaps that's not compatible with Quantum.
Capturas de pantalla anexas

Chosen solution

To disable e10s/multiprocess go to about:config by typing it in your URL bar. Search for browser.tabs.remote.autostart using the search box on about:config. There may be multiple results. Set them all to false and restart the browser.

Ler a resposta no contexto 👍 1

All Replies (4)

more options

Chosen Solution

To disable e10s/multiprocess go to about:config by typing it in your URL bar. Search for browser.tabs.remote.autostart using the search box on about:config. There may be multiple results. Set them all to false and restart the browser.

more options

Thanks. Mkll. As verified by Task Manager, that successfully causes FF 57 to work in single process mode. And so far, NVDA seems to be behaving much better with the change.

Thank you.

more options

Hi, please mark my reply as the solution since it solved your problem.

more options

I'd accidentally marked my Reply to you as the solution. Sorry about that.